Julia Roberts has been America's movie sweetheart for a while. Here she is in 1995. (Associated Press)

Julia Roberts has been America's movie sweetheart for a while. Here...

Julia Roberts has been America's movie sweetheart for a while.... Photo-3274781.46907 - SFGate

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Julia Roberts in 2011. She's reached an age (44) when many actresses struggle to find good parts. But Roberts had a meaty role in this year's "Mirror Mirror." (Alberto E. Rodriguez / 2011 Getty Images)